Improved Sasol Fischer-Tropsch processes
- Sastech R and D, Sasolburg (South Africa)
Fischer-Tropsch (FT) processes can be used to produce either a light syncrude and light olefins or to produce heavy waxy hydrocarbons. The syncrude can be refined to environmentally friendly gasoline and diesel and the heavy hydrocarbons to specialty waxes or if hydrocracked, and/or isomerized, to produce excellent diesel, lube oils and a naphtha which is ideal feedstock for cracking. Over the last few years much better reactor systems have been developed for both high temperature FT (HTFT) and low temperature FT (LTFT). For HTFT the Sasol Advanced Synthol (SAS) reactor with solid-gas fluidization was developed. This gives very much the same product spectra as the CFB reactors, but does it much more effectively and cheaply. For LTFT, the Sasol Slurry Phase Distillate (SSPD) reactor, of the bubble column type, was developed which is a significant improvement on the tubular fixed bed (TFB) reactor used in the Arge process. The SSPD reactor can make products with the same carbon distribution as the TFB reactor with Schulz-Flory distribution alpha values 0,95 and higher. It has greater flexibility with respect to product distribution. The paper describes both reactors, and the integration of Fischer-Tropsch synthesis with coal gasification.
- OSTI ID:
- 257217
- Report Number(s):
- CONF-950952--
- Country of Publication:
- United States
- Language:
- English
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